Originally Posted by
dutret
yeah it's been known to happen. Also it sucks when you only have a 48 and someone offers to let you try their 49 only to find out you can't use it.
See your answers are usually helpful, you just give them to people who didn't ask the questions. I'm sure that situation would be dissapointing, but I'd be willing to bet that the vast majority of casual track crank users represented here by the OP will NEVER be in the situation.
The kind of person who'd be hanging out swapping chainrings is going to know what crank to buy in the first place, and if they didn't, they'd be asking the friend who has the 49 for them to borrow, not us.